Improvement in metallic roofings



a8. cox. 7 Metallic Roofing;

I Patented Sept. 1,1874.

g STATES SETH cox,.or OSKALOOSA, IOWA.

PATENT QFFIOE.

IMPROVEMENT IN METALLIC-ROOFINGS,

pecifichtion forniing part of Letters Patent N05 154,649, datedSeptember 1, 1874; application filed July 3, 1874.

To all whom it may concern:

Be it known that I, SETH Uoxmf Oskaloo'sa, Mahaska county, Iowa,hareinvented a new and useful Improvement in "Metallic .Itoofin g, to beknown by the name American Rooting, of which the following is aspecification:

, The object of this invention'is to construct V a new and improved kindof metallic roof; and

it consists in the provision made for-counteracting the effects ofexpansion and contraction incident to changes of temperature, the saidprovisions being in the corrugations and manner of attaching 'themetalto the roof hoards or timbers.

In the drawing, Figure 1 is atop view, with 1a portion of the corrugatedrooliug' broken away to showthe flanged strips or rails on which thecorrugated rooting rests and to which it is confined and .Fig. 2 is across-sec tion of Fig. 1, taken onthe line a: w'.

Similar letters of reference indicate col-re spending parts.

A-are, the roof-boards or sheathing-W B represents double-fiangedmetallic strips or rails, attached to the roof-boards or rafters bymeans.

of nails or screws through their lower flanges. C are cl sps attz ehed'to the under side of the metallic roofing, which clasp'sare bent so asto receive the upper flanges of strips B; D-is the corrugated metallicroofing. E represents the corrugations. The roofing Dis formed, of

sheets of metal soldered together, so as to makea continuous water-proofsheet or root; and the sheets, (the whole or a 11311,) provided .withthe clasps C, are slipped onto the strips 3 B, and thus confined to theroof. This allows the roof to expand and contract in one direction,while the corrugation? E allow it to ex- "pond and contract in theother. The clasps G "confine the metallicroof to the boards or' ratt- 1ers; but the edges are fastened by means of. screws F, which passthrough slots in they metal sheets. Instead of continuous strips B tohold the c foot" down, a succession of screws may be driven into theroof. boards. or timbers, with the heads-of which the clasps C'mayengage; but I preferthe continuous strips or rails B, ,4

G represents the air-space between the metallic roofin g and theroof-boards or sheathing. This air-space serves as a shield. to protectthe building from fire onthe This space Gr .may be greater or smaller,as may be desired, 1 according to the depth of the flanged strips or prails B; and, as air is a good non-conductorof beat, this space will.prove a protection in all e ordinary cases. I

Having thus described my invention, I 0131]!!- as new and desire tosecure by Letters Pat- 'ent--

